Planning an overseas holiday in 2025? If there's one thing most of us want access to while travelling abroad (besides our passports), it's our phones. Not only can a handset with internet access help you navigate unfamiliar territory, it'll also keep you in contact with your loved ones back home.
Of course, nothing spoils a getaway faster than excessive international roaming charges, making it incredibly important to make sure your phone plan has you covered while you're venturing outside of Australia.
Alternatively, you could opt to buy a SIM card from from one of your destination's local telcos, though you may find some barriers for entry — not every country makes it easy, and some carriers even require you to provide a local address. On top of these hurdles, you'll also have a different phone number.
In truth, it's always going to be easier to simply keep your current Australian number and not have to worry about switching out SIM cards. However, one thing you will need to take into account is whether or not your telco charges a daily fee for international roaming, along with the amount of mobile data that you're entitled to while abroad.
To get you up to speed, we've put together this guide to what each of Australia's three major telcos (Telstra, Optus and Vodafone) offer in terms of international roaming (including how much they cost per day, and what kind of daily data allowance you can expect.
The best plans for international roaming
Winner: Vodafone
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Vodafone may not be in first place when it comes to coverage within Australia, but the carrier has a far greater global reach than its competitors, operating its own networks in 21 countries, and holding network partnership agreements with local carriers in 47 more.
Because of this, Vodafone is able to offer its customers a far more seamless international roaming experience than Telstra or Optus. For just AU$5 per day in over 100 countries, Vodafone customers get full access to their Aussie plan's usual inclusions — no need to worry about daily data allowances. That said, Vodafone's AU$5 roaming can only used for a maximum of 90 days per calendar year, so make sure you plan accordingly.
That said, if you do go over your usual monthly data cap, Vodafone will charge you AU$5 for each additional gigabyte of usage. Here are the top three Vodafone plans which include international data roaming.
On top of all this, Vodafone has recently doubled its data limits across its postpaid plans, meaning you can currently get a massive 720GB p/m at the promotional price of AU$69 AU$59 p/m.
International roaming on other carriers
Telstra
While Telstra is undoubtedly a top dog within Australia, its value offering is far less appealing once you venture beyond our shores.
When you arrive in another country with data roaming enabled on your phone, Telstra's International Day Pass will kick in automatically at a cost of AU$10 per day. For that price, you get unlimited talk and standard text (MMS will cost you AU$0.75 per pic) and 1GB of data (unless you've travelled to New Zealand, in which case the day pass will only cost you AU$5). If you exceed that daily allowance, you will be charged an additional AU$10 (or AU$5 in NZ) for another gigabyte.
Thankfully, Telstra roaming is widely available, with full access in 73 countries, and limited access (only calls and text, no data) in seven additional destinations. Here are the top three Telstra plans which include international data roaming.
Optus
Optus is far more generous than Telstra when it comes to international roaming, with Australia's second biggest telco offering five times the daily data allowance at half the price. Customers on postpaid Optus plans will get unlimited talk and text and 5GB of data for only AU$5 per day, which is quite a good deal. All you have to do is activate the Optus International Roaming Add-on in the My Optus app.
Additionally, Optus customers also have the option of paying for a week upfront, with a 7-day pass getting you 35GB of data with unlimited talk and text for AU$35. Of course, there isn't really any benefit to doing this outside of convenience, with the price working out the same either way.
Impressively, Optus' roaming add-on works in over 100 'Zone 1' destinations, which is significantly more than what Telstra is offering. Of course, if you do find yourself in one of the remaining 'Zone 2' destinations, you'll have to pay the standard international rates, which'll certainly cost you. Here are the top three Optus plans which include international data roaming.
Given the seamless nature of Vodafone's international roaming experience, in that you get access to the same amount of data you'd normally have within Australia in over 100 countries, and its low AU$5 daily cost, Vodafone is the clear winner.
That said, Optus' international roaming add-on is not to be sneezed at, offering decent value for money and far more overseas data than Telstra.
For those who aren't planning to travel overseas anytime soon, here are the best SIM only plans in Australia.
